Scope and organization of argumentation

A discourse that seeks to persuade or convince is not made up of an accumulation of disorderly arguments, indefinite in number; on the contrary, it requires an organization of selected arguments presented in the order that will give them the greatest force. After its analysis of the various types of arguments, the new rhetoric naturally deals with the study of the problems raised by the scope of the argumentation, the choice of the arguments, and their order in the discourse.

Although formal demonstrative proof is most admired when it is simple and brief, it would seem theoretically that there would be no limit to the number of arguments that could be usefully accumulated; in fact, because argumentation is concerned not with the transfer from the truth of premises to a conclusion but with the reinforcement of the adherence to a thesis, it would appear to be effective to add more and more arguments and to enlarge the audience. Because the argumentation that has persuaded some may fail to have any effect on others, it would appear to be necessary to continue the search for arguments better adapted to the enlarged audience or to the fraction of the audience that has been hitherto ignored.

In practice, however, three different reasons point to the need to set bounds to the scope of an argumentation. First, there are limits to the capacity and the will of an audience to pay attention. It is not enough for an orator to speak or write; he must be listened to or read. Few people are prepared to listen to a 10-hour speech or read a book of 1,000 pages. Either the subject must be worth the trouble or the hearer must feel some obligation to the subject or orator. Normally, when a custom or an obligation exists, it binds not the hearer but the orator, setting limits to the space or time allotted to the presentation of a thesis. Second, it is considered impolite for an orator to draw out a speech beyond the normally allotted time. Third, by the mere fact that he occupies the platform, an orator prevents other people from expressing their point of view. Consequently, in almost all circumstances in which argumentation can be developed, there are limits that are not to be overstepped.

It thus becomes necessary to make a choice between the available arguments, taking into account the following considerations: first, arguments do not have equal strength nor do they act in the same manner on an audience. They must be considered relevant for the thesis the speaker upholds and must provide valuable support for it. It is essential that they do not—instead of reinforcing adhesion—call the thesis into question again by raising doubts that would not have occurred to the audience had they not been mentioned. Thus, proofs of the existence of God have shaken believers who would never have thought of questioning their faith had such proofs not been submitted to them. Second, there is constant interaction between the orator and his discourse; thus, the speaker's prestige intensifies the effect of his discourse, but, inversely, if his arguments are weak, the audience's opinion of his intelligence, competence, or sincerity is influenced. Therefore, it is best to avoid using weak arguments; they may induce the belief that the speaker has no better arguments to support his thesis. Third, certain arguments, especially in the case of a mixed audience whose beliefs and aspirations are greatly varied, may be persuasive for only one part of an audience. Therefore, arguments should be chosen that will not be opposed to the beliefs and aspirations of some part of the audience. Thus, by stressing the revolutionary effect of a particular measure, for example, one stiffens the opposition to that measure on the part of those who wish to prevent the revolution, but one draws to the measure the favour of those who wait for the revolution to break out. For this reason arguments that have value for all men are superior to those that have more limited appeal; they are capable of convincing all the members of what could be called the universal audience, which is composed of all normally reasonable and competent men. An argumentation that aims at convincing a universal audience is considered philosophically superior to one that aims only at persuading a particular audience without bothering about the effect it might have on another audience in some other context or circumstances.

Further, for a discourse to be persuasive, the arguments presented must be organized in a particular order. If they are not, they lose their effectiveness, because an argument is neither strong nor weak in an absolute sense and for every audience but only in relation to a particular audience that is prepared to accept it or not. In the first place, the orator must have a certain amount of prestige, and the problem in question must raise some interest. Should the orator be a small child, a man of ill-repute, or one supposed to be hostile to the audience or should the question be devoid of interest for the audience, there is little chance that the orator will be allowed to speak or that he will be listened to. Thus, an orator is normally introduced by someone who has the public ear, and the orator then uses the exordium, or beginning portion of his discourse, not to speak about his subject but to gain the audience's sympathy.

Effective arguments can modify the opinions or the dispositions of an audience. An argument that is weak because it is ill-adapted to the audience can become strong and effective when the audience has been modified by a previous argument. Similarly, an argument that is ineffective because it is not understood can become relevant once the audience is better informed. Research into the effectiveness of discourse can determine the order in which arguments should be presented. The best order, however, will often be whatever is expected, whether it be a chronological order, a conventional order, or the order followed by an opponent whose argumentation has to be refuted point by point.

In all these considerations—concerning the techniques of presentation and argumentation and the arrangement of a discourse—form is subordinated to content, to the action on the mind, to the effort to persuade and to convince. Consequently, the new rhetoric is not part of literature; it is concerned with the effective use of informal reasoning in all fields.

It has been seen that common principles and notions and common loci play a part in all nonspecialized discourses. When the matter that is debated belongs to a specialized field, the discussion will normally be limited to the initiated—i.e., those who, because of their more or less extensive training, have become familiar with the theses and methods that are currently accepted and regarded as valid in the field in question. In such instances, the basis of the argumentation will not be limited to common loci but to specific loci. The introduction in some field of a new thesis or new methods is always accompanied by criticism of the theses or methods that are being replaced; thus, criticism must be convincing to the specialists if the new thesis or method is to be accepted. Similarly, the rejection of a precedent in law has to be justified by argumentation giving sufficient reasons for not applying the precedent to the case in question.